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Internal and external quantum efficiency and injection efficiency of nitride-based UV/DUV devices were investigated. Non radiative component in the photoluminescence and electroluminescence is found to be strongly correlated with the dislocation density.
The CW phased-array antenna for the EBWH/CD has been developed in QUEST. The measured fields were in excellent agreement with those evaluated by the Kirchhoff integral. The thermal load and stress were analyzed. The phase array has been fast scanned to control the incident polarization and angle.
The square waveguide phased-array antenna system has been developed for Electron Bernstein Emission diagnostics. The broadband orthomode transducer was prepared to measure the wave polarization. The measured fields were in good agreements with those evaluated from the Kirchhoff integral.
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